Bill earns $12 per hour and works at most 40 hours per week. identify the independent and dependent quantity in the situation, and find reasonable domain and range values.

a. amount of money earned; hours worked; 0 to 40; $0 to $480

b. hours worked; amount of money earned; $0 to $480; 0 to 40

c. hours worked; amount of money earned; 0 to 40; $0 to $480

d. amount of money earned; hours worked; $0 to $480; 0 to 40